The ALARM LOCK Trilogy® electronic access control lock works easily using only a code. Maximum 2000 user codes. 40,000 event audit trail. Fingertip programmable at vandalproof all-metal keypad. Using an electronic door lock helps eliminate the problem of lost keys and rekeying costs. Easily replaces most standard knobsets. Nonhanded. Long life battery operation. Standard core. Key override. Works in conjunction with Sargent® exit devices (not included).